Cartridge for determining the electrochemical characteristics of a liquid



FIG. 1 is a top view of a cartridge for determining the electrochemical characteristics of a liquid showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a rear view thereof. 

An ornamental design for a cartridge for determining the electrochemical characteristics of a liquid, substantially as shown and described. 